1. Standard 18 –carat gold sold
in the market contains
(a)
82 parts gold and 18 parts other metals
(b)
18 parts gold and 82 parts other metals
(c)
18 parts
gold and 6 parts other metals
(d)
9 parts gold and 16 parts other metals
2. Consider the following
statements.
1.
Baking soda is used in fire extinguishers.
2.
Quicklime is used in the manufacture of glass.
3.
Gypsum is used in the manufacture of plaster of
Paris.
Which of the statements given above is/ are
correct?
(a)
1 and 2
(b)
2 and 3
(c)
1 only
(d)
1, 2 and 3
3. Which one among the following statements is not correct about
graphite?
(a)
It is the
most stable allotrope of carbon
(b)
It is an electrically conducting material
(c)
Crystalline spherical beads of graphite have
very good lubricating property under dry conditions
(d)
It is the higher grade of coal
4. Ethanol mixed petrol is being
sold in various states web 1st January, 2003. The percentage of
ethanol in petrol is
(a)
10% (b)
7% (c) 6% (d) 5%
(a)
Salts have ordered packing arrangements called
lattices
(b)
Salts have low melting points but high boiling
points
(c)
Salts are brittle
(d)
Salts conduct electricity when dissolved in
water or even in the molten state
6. By which one among the following mechanisms, soap removes dirt
(soil) from cloth?
(a)
Soap dissolves the soil as such
(b)
Soap reacts with soil and converts them into
soluble silicates
(c)
Soap takes away the oily part of the soil and
thus separates the soil from the cloth
(d)
The soap molecules bind with the soil, lift the
soil and keep it suspended which can then be rinsed away
|
List I
|
List II
|
|
a. Smoke
b. Gel
c. Emulsion
d. foam
|
1. dispersion
of gas in liquid
2. dispersion
of solid in solid
3. dispersion
of liquid in liquid
4. dispersion
of liquid in solid
5. dispersion
of solid in gas
|
Codes
A B
C D
(a)
4 2 3 1
(b)
5 4 3 1
(c)
2 4 1
5
(d)
5 2 1 3
1.
Water has higher specific heat in comparison
with other liquid
2.
Water has no dipole moment
3.
Water has low heat of vaporization.
Which of the statements given above is/ are correct?
(a)
Only 1
(b)
2 and 3
(c)
1 and 3
(d)
Only 3
9. The bond which is present between water
molecules is
(a)
Electrovalent bond
(b)
Covalent bond
(c)
Hydrogen bond
(d)
Van der Waals’ bond
10. Amalgam is a mixture of
(a)
Any non-metal and chlorine
(b)
Any metal and fluorine
(c)
Any non-metal and lead
(d)
Any metal and mercury
Answer:
1.
C
2.
D
3.
D
4.
D
5.
B
6.
D
7.
B
8.
A
9.
C
10.
D
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